SOLR-8453: Fix raw socket test to correctly use HTTP spec: headers in HTTP are US-ASCII, body's Content-Length is number of bytes (not chars!), PrintWriter swallows Exceptions and was not needed (Forbidden apis found the bug, but fix was incorrect)
lucene/dev/trunk/solr/solrj/src/test/org/apache/solr/client/solrj/TestSolrJErrorHandling.java